This is Karl-Heinz Ertel (1919-1993) He was an RKT and Adjutant to the SS Volunteer Panzer Grenadiers, Regiment 49 "De Ruyter". If you look to the left, I have enhanced his signature a bit. He signed it with a green pencil, and it does not show up real well. If you were holding it in your hand you could see it fine. CLICK THE IMAGES TO SEE THEM BETTER.